Design, Analysis and Manufacturing of Gas Foil Bearing

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Majidi, Mohammad Hassan | 2015

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 47019 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Akbari, Javad; Movahhedy, Mohammad Reza
Abstract:
Foil gas bearings are compliant surface, self-acting hydrodynamic bearings that use ambient gas as their working fluid. They do not require external pressurization and are typically constructed from several layers of sheet metal foils. In high-speed, high-temperature applications the GFB’s have the advantage of developing higher load capacities than with ﬁxed geometry gas bearings. Since GFB’s have a complex structure consisting of a spring-like substructure with an overlying ﬂexible surface, there exists a great variety of permutations on any given design. At current work presents a 1D model for GFB with couple solving Reynolds and Euler-Bernoulli beam equation. This mean top foil assume to be like Euler-Bernoulli beam. From presented model calculated load carry capacity and check the effects of effective parameters like clearance, support stiffness and etc. final approved the designed GFB with model and manufacture it. At final step made an operational test to approve performance of built bearing
Keywords:
Air Bearing ; Reynolds Equation ; Metallic Meshes ; Euler-Bernoulli Theory ; Aerodynamic Bearing ; Foil Bearing ; Bump Foil

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